Lei LI, Liping TANG, Qiuyang MA, Zijiang GAO, Yang GAO, Yingying QIAO. CO Detection Based on Photoacoustic Spectroscopy with CEEMDAN[J]. Acta Photonica Sinica, 2022, 51(11): 1130001
- Acta Photonica Sinica
- Vol. 51, Issue 11, 1130001 (2022)
Fig. 1. Simulation of noise reduction performance
Fig. 2. CO absorption coefficient diagram
Fig. 3. Differential photoacoustic cell operating in a first-order longitudinal resonance mode
Fig. 4. Optimized modulation amplitude
Fig. 5. The PAS system and differential photoacoustic cell
Fig. 6. The IMF components
Fig. 7. Noise reduction performance
Fig. 8. The relation between gas concentrations and second harmonic signal amplitudes（inset shows the noise measured at the pure N2 background）
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Table 1. Performance comparison of wavelet algorithm and the noise reduction and reconstruction algorithm based on CEEMDAN
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Table 2. The correlation coefficients of the components and original signal
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Table 3. Performance parameters of PAS system
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